Comp Cams High EnergyT, 252H Smooth Idle w/ Fuel Economy, Strong Torque Cylinder Heads Mandrel-bent primary tubes - Minimizes

Mandrel-bent primary tubes - Minimizes turbulence and keeps exhaust velocity consistent from cylinder to collector

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Comp Cams High EnergyT, 252H Smooth Idle w/ Fuel Economy, Strong Torque Cylinder Heads Mandrel-bent primary tubes - MinimizesHigh EnergyT, 252H Smooth Idle w Fuel Economy, Strong Torque Lifter Type: Hydraulic Lifter Engine Family: Pontiac 265 455 c. i. 8 cyl. 1955 1981 Description: Hydraulic Smooth idle with fuel economy for 326 to 400. Strong torque. Best cam for 301. Cam Family: High EnergyT Hydraulic Flat Tappet Camshafts Specification: RPM Range: 800 to 4800 Valve Timing: 0. 018 Lobe Separation: 110 Intake Centerline: 106 Valve Lash: Hyd. Intake Hyd. Exhaust Duration: